Use of optical reflectance proximity detector for nuisance mitigation in smoke alarms
First Claim
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1. A smoke alarm, comprising:
- smoke detection circuitry for detecting smoke and generating a smoke detection signal responsive thereto;
proximity detection circuitry for generating a proximity detection signal when the proximity detection circuitry detects a movement of an object within a selected distance of the smoke alarm; and
alarm generation circuitry for generating an audible alarm responsive to the smoke detection signal, wherein the audible alarm is temporarily deactivated when at least two proximity detection signals are generated within a predetermined period of time and while the smoke detection signal is received.
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Abstract
A smoke alarm comprises smoke detection circuitry for detecting smoke and generating a detection signal responsive thereto. Proximity detection circuitry generates a proximity detection signal responsive to detection of an object within in a selected distance of the smoke alarm. Alarm generation circuitry generates an audible alarm responsive to the detection signal. The audible alarm may be deactivated for a predetermined period of time responsive to at least one proximity detection signal.
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Citations
14 Claims
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1. A smoke alarm, comprising:
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smoke detection circuitry for detecting smoke and generating a smoke detection signal responsive thereto; proximity detection circuitry for generating a proximity detection signal when the proximity detection circuitry detects a movement of an object within a selected distance of the smoke alarm; and alarm generation circuitry for generating an audible alarm responsive to the smoke detection signal, wherein the audible alarm is temporarily deactivated when at least two proximity detection signals are generated within a predetermined period of time and while the smoke detection signal is received. - View Dependent Claims (2, 3, 4, 5)
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6. A method for controlling operation of a smoke alarm, comprising:
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detecting smoke with the smoke alarm; generating an audible alarm responsive to detection of the smoke; detecting movement of an object within a selected distance of the smoke alarm, wherein the movement is detected using a proximity detection circuit; and temporarily deactivating the audible alarm when at least two movements of the object are detected within a predetermined period of time and within the selected distance of the smoke detector and while detecting the smoke. - View Dependent Claims (7, 8, 9)
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10. A method for controlling operation of a smoke alarm, comprising:
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detecting smoke with the smoke alarm; generating an audible alarm responsive to detection of the smoke; detecting movement of an object within a selected distance of the smoke alarm, wherein the movement is detected using a proximity detection circuit; and controlling operation of the smoke alarm when at least two movements of the object are detected within a predetermined period of time and within the selected distance of the smoke alarm and while the smoke is detected. - View Dependent Claims (11, 12, 13, 14)
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Specification